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  <meta charset="UTF-8">
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  <title>Date2</title>

  <div class="calendar"></div>
  <script src="../lib/date2/index.js"></script>
  <script>
    {
      let assert = console.assert.bind(console)
      let date = new Date(2011, 0, 4, 6, 8, 10, 999)
      let d1 = new Date2(date)
      assert(d1.date !== date)
      assert(d1.date.getTime() === date.getTime())

      assert(d1.weekday() === date.getDay())
      assert(d1.day() === date.getDate())
      assert(d1.year() === date.getFullYear())
      assert(d1.month() === date.getMonth() + 1)
      assert(d1.hours() === date.getHours())
      assert(d1.minutes() === date.getMinutes())
      assert(d1.seconds() === date.getSeconds())
      assert(d1.milliseconds() === date.getMilliseconds())
      assert(d1.year(2012).date.getFullYear() === 2012)
      assert(date.getFullYear() === 2011)
      assert(d1.month(4).date.getMonth() === 3)
      assert(d1.day(1).date.getDate() === 1)
      assert(d1.hours(2).date.getHours() === 2)
      assert(d1.minutes(2).date.getMinutes() === 2)
      assert(d1.seconds(2).date.getSeconds() === 2)
      assert(d1.milliseconds(2).date.getMilliseconds() === 2)

      assert(d1.monthBeginning.day() === 1)
      assert(d1.monthEnding.day() === 31)

      let d2 = new Date2(new Date(2011,0,31))
      assert(d2.nextMonth.month() === 2)
      assert(d2.nextMonth.nextMonth.month() === 3)
    }

  </script>

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